Everyone is …… claim that they are the best_______ in their

Everyone is …… claim that they are the best_______ in their life.A.having been read ……
Everyone is talking about the works by MoYan,the first Nobel Prize winner in China after a meal or in their free time; some even claim that they are the best_______ in their life.
A.having been read B.even read C.have been read D.to be read
B D 老师说B是定语从句,求解（B也可能是ever read）